Senate district twenty is composed of Bernalillo county precincts 293, 297 through 300, 305, 306, 308, 335, 348, 364, 389, 391, 395, 464, 472 through 474, 480, 503 through 506, 516, 518, 519, 525 through 527, 530 through 537, 540, 542 through 550, 561, 564 through 566, 603, 656, 657, 672, 678 and 680.